Entanglement charge of thermal states

TL;DR

This paper introduces a generalized measure called entanglement charge to quantify nonlocalities in bipartite quantum states, analyzing its behavior in thermal states of two-qubit systems as functions of temperature and system parameters.

Contribution

The paper extends the concept of entanglement charge from ensembles to single bipartite states and provides analytical analysis of thermal states.

Findings

Entanglement charge varies with temperature and system parameters.

Analytical expressions for entanglement charge in thermal states.

Insights into nonlocality in bipartite quantum systems.

Abstract

Entanglement charge is an operational measure to quantify nonlocalities in ensembles consisting of bipartite quantum states. Here we generalize this nonlocality measure to single bipartite quantum states. As an example, we analyze the entanglement charges of some thermal states of two-qubit systems and show how they depend on the temperature and the system parameters in an analytical way.